期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
浅谈稻纵卷叶螟的形态危害及防治方法 被引量:4
1
作者 沈梦姝 《畜禽业》 2020年第3期34-34,共1页
在水稻生产过程中,虫害对水稻的产量和品质的危害极大,不同的害虫侵害部位和方式也有不同,其中对水稻的危害极大的一种害虫是稻纵卷叶螟,就水稻卷叶螟的形态特征、危害方式以及防治方法进行了分析。
关键词 水稻 水稻卷叶螟 害虫形态 防治方法
下载PDF
Cymolomia hartigiana (Saxesen,1840)(Lepidoptera: Tortricidae) at-tacking to Abies nephrolepis Max. New to Daxing'anling,Heilongji-ang,China
2
作者 边凤奎 李成德 张立志 《Journal of Forestry Research》 SCIE CAS CSCD 2004年第1期67-68,J003,共3页
An Olethreutine speciesCymolomia hartigiana (Saxesen, 1840), attacking toAbies nephrolepis Max., is reported for the first time from Daxing'anling, Heilongjiang, China. The morphological characteristics are briefl... An Olethreutine speciesCymolomia hartigiana (Saxesen, 1840), attacking toAbies nephrolepis Max., is reported for the first time from Daxing'anling, Heilongjiang, China. The morphological characteristics are briefly re-described with illustrations. Also its damage and biology are noted. Key words Systematics - Lepidoptera - Tortricidae - Cymolomia - Daxing'anling - China CLC number Q969.429.2 - S763.3 Document code A Foundation item: This study was carried out under the financial support by KOSEF (Korea Science & Engineering Foundation) with the program of “Korea and China Young Scientist Exchange Program” (2002–2003).Biography: *BYUN Bong-Kya (1963-), male, Ph.D., Researcher in Korea National Arboretum, Korea.Responsible editor: Chai Ruihai 展开更多
关键词 SYSTEMATICS LEPIDOPTERA TORTRICIDAE Cymolomia Daxing'anling China
下载PDF
Pest Detection Method Using Multi-Fractal Analysis 被引量:3
3
作者 Yun-Ki KIM Jang-myung LEE 《Journal of Measurement Science and Instrumentation》 CAS 2011年第3期240-243,共4页
A novel method for pest detection is proposed based on the theory of multi-fractal spectrum to extract pests on plant leaves.Both local and global information of the image regularity were obtained by multi-fractal ana... A novel method for pest detection is proposed based on the theory of multi-fractal spectrum to extract pests on plant leaves.Both local and global information of the image regularity were obtained by multi-fractal analysis.By applying fractal dimension,the spots on leaf images can be extracted without loosing or introducing any information.The different parts of images are re-analysis by morphology operations to determine the candidate regions of pests.The performance of multi-fractal analysis of whitefly detection is investigated through greenhouse experiments.The experimental results show that the proposed method is robust to noise from light and is not sensitive to the complex environment. 展开更多
关键词 multi-fractal analysis image segmentation pest detection
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部